My Inquiry
My Account
Skyworks Solutions Inc. SI83418BDA-IFR
- Part No.:
- SI83418BDA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83418BDA-IFR.pdf
- Description:
- 4 CH. ISOLATED SMART SWITCH, SIN
- Quantity:
- Payment:
- Shipping:
Inventory:1,317
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI83418BDA-IFR from Skyworks Solutions is a 4-channel isolated smart switch IC with galvanic CMOS isolation, configured as high-side switches delivering 700 mA continuous current per channel (RON = 155 mΩ) and supporting 9–32 V switch supply voltage. It integrates SPI-based diagnostics, overcurrent/overtemperature protection, and 1.5 kVRMS safety-rated isolation for industrial PLC output modules driving solenoids and relays.
For engineers reviewing the SI83418BDA-IFR datasheet, SI83418BDA-IFR pinout, SI83418BDA-IFR application, or SI83418BDA-IFR equivalent, this page delivers verified specifications, real-world diagnostic reporting behavior, SPI-controlled fault management, and precise channel-level protection thresholds - all confirmed for the SI83418BDA-IFR variant per Skyworks' official Si834x datasheet Rev. 206512A.
Technical Context
The SI83418BDA-IFR implements four independent high-side switch channels, each with dedicated isolation barriers using RF-modulated CMOS isolation (not optocoupler-based), achieving >100 kV/µs common-mode transient immunity. Each channel includes integrated voltage, current, and temperature sensing with autonomous protection logic.
It uses an SPI-only interface (no parallel control pins) for full diagnostic access and switch enable/disable control via SW_EN register bits; fault reporting includes eight distinct diagnostics (e.g., open-circuit, overcurrent, VDD2 undervoltage) communicated through status registers and an active-low FLT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 4 high-side switches - enables consolidated control of multiple industrial loads without external driver stages. |
| Continuous Current per Channel | 700 mA - supports standard solenoid and relay coils in PLC I/O modules without derating at 125°C ambient. | RON (per channel) | 155 mΩ - minimizes power loss (≤77 mW at 700 mA) and thermal rise in compact DFN-32 packages. |
| Switch Supply Range | 9 V–32 V - compatible with 24 V DC industrial bus systems and tolerant of brownout conditions down to 9 V. |
| Logic Supply Range | 2.25 V–5.5 V - interfaces directly with low-voltage MCUs (e.g., ARM Cortex-M0+) without level-shifting. |
| Isolation Rating | 1.5 kVRMS - UL 1577-recognized for reinforced insulation in functional safety applications up to CAT II. |
| CMTI | >100 kV/µs - ensures reliable operation in electrically noisy factory environments with fast-switching motor drives. |
| Diagnostic Interface | SPI-only (MOSI/MISO/SCLK/NSS) - provides read/write access to eight fault registers and channel status without parallel pin overhead. |
Pinout & Package
SI83418BDA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), optimized for industrial PCB layouts requiring high-density isolation and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface (SPI, registers); accepts 2.25–5.5 V; internal UVLO at ~2.05 V. |
| VDD2 | Switch supply input (x4) | Provides power to all four high-side drivers; 9–32 V range; monitored for undervoltage warning and shutdown. |
| GND1 / GND2 | Logic ground / switch ground | Galvanically isolated grounds - mandatory separation prevents ground-loop noise coupling into sensitive control circuits. |
| MOSI / MISO / SCLK / NSS | SPI interface signals | Full-duplex SPI port for configuration, status reads, and SW_EN bit control; operates up to 10 MHz. |
| FLT | Active-low fault indicator | Open-drain output pulsed low on any diagnostic fault (e.g., overtemperature, open load); cleared only after fault removal + tCFD delay. |
| B1–B4 | High-side switch outputs | Four isolated source outputs - each drives load between Bn and VDD2; internally clamped against inductive kickback. |
| EP | Exposed thermal pad | Internally connected to GND2; must be soldered to PCB copper pour for thermal management (θJA ≈ 32°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based CMOS isolation | Eliminates LED aging and CTR drift of optocouplers; guarantees >100 kV/µs CMTI across full temperature range. |
| Smart output clamp | Multi-voltage clamp handles unlimited demagnetization energy (EAS) while enabling fast turn-OFF (<1 µs) for inductive loads. |
| Inrush Current Mode | Not enabled on SI83418BDA-IFR - distinguishes it from AAA/ADA variants; optimized for steady-state solenoid control. |
| Eight diagnostics via SPI | Includes VDD2 undervoltage, overtemperature, overcurrent, open-circuit, communication error - all independently readable and clearable. |
| Asynchronous output disable | No OE pin - disable is software-controlled via SPI SW_EN register, enabling coordinated multi-channel shutdown sequences. |
| IEC 61131-2 compliance | Meets Type 1/Type 3 input/output requirements for programmable controllers - validated for 24 V DC industrial signal integrity. |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Data Acquisition System |
|---|---|
|
Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in modular PLC backplanes with strict EMC and isolation requirements. IC Role / Device Role / Timing Role: High-side switch providing galvanically isolated, current-limited load control with real-time fault feedback to the controller CPU. Use Value: Replaces discrete optocoupler + MOSFET + protection circuitry with single-chip solution, reducing BOM count by ≥6 components per channel and improving MTBF. |
Use Scenario: Conditioning and isolating analog sensor actuation signals in distributed I/O nodes deployed across factory floors. IC Role / Device Role / Timing Role: Isolated switch enabling safe activation of calibration loads or reference shunts during self-test sequences. Use Value: SPI-accessible diagnostics allow remote validation of output health without physical inspection - critical for unattended DAQ deployments. |
| Motion Controller Axis Enable | Smart Solid-State Relay Replacement |
|
Use Scenario: Enabling/disabling stepper/servo motor power stages in CNC machines where EMI immunity and fail-safe shutdown are mandatory. IC Role / Device Role / Timing Role: High-side switch with overtemperature constraint logic that prevents axis enable during thermal overload conditions. Use Value: Integrated thermal monitoring eliminates need for external NTC sensors and comparator circuits - reduces board area by 28 mm² per axis. |
Use Scenario: Replacing electromechanical relays in HVAC control panels where contact wear, bounce, and lifetime limitations cause maintenance issues. IC Role / Device Role / Timing Role: Solid-state high-side switch delivering silent, bounce-free switching with built-in open-load detection for coil integrity verification. Use Value: 100 million cycle lifetime vs. 100k mechanical cycles; open-circuit warning allows predictive maintenance before system failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated high-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83418ADA-IFR | Same 4-channel high-side architecture but adds Inrush Current Mode (8 A for 20 ms) for lamp loads. | Required when driving incandescent lamps or cold-wire heaters needing high initial surge current. | Select SI83418ADA-IFR only if inrush capability is needed; SI83418BDA-IFR offers tighter thermal control for steady-state solenoid use. |
| SI83418AFA-IFR | Supports both SPI and parallel interface modes; includes VDD2_WRN and OPEN_CH indicator pins. | Suitable for designs requiring hardware-fallback diagnostics without SPI polling (e.g., safety-critical watchdog paths). | Choose SI83418AFA-IFR when dual-interface flexibility or dedicated fault pin routing is required; SI83418BDA-IFR prioritizes SPI-only simplicity and pin count reduction. |
Compared with SI83418ADA-IFR and SI83418AFA-IFR, the SI83418BDA-IFR delivers the most streamlined SPI-only control path with no extra indicator pins or inrush circuitry - ideal for space-constrained, firmware-managed PLC output stages where deterministic diagnostic latency matters more than hardware fallbacks.
Availability
SI83418BDA-IFR is available at Aetrix Electronics and suitable for industrial programmable logic controllers, motion controllers, and smart solid-state relay designs requiring stable component supply, long-term lifecycle support, and certified isolation performance.
Supply support for SI83418BDA-IFR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies for high-reliability applications.
The Si834x product line was designed specifically for industrial automation systems requiring robust, digitally configurable isolated switching - replacing legacy optocoupler-based drivers with integrated protection, diagnostics, and safety-certified isolation.
FAQ
What is the maximum continuous current per channel for SI83418BDA-IFR?
The SI83418BDA-IFR supports 700 mA continuous current per channel at 125°C ambient, with RON = 155 mΩ. This rating is validated under worst-case thermal conditions with proper PCB copper pour on the exposed pad; derating is not required below 100°C ambient.
Does SI83418BDA-IFR support inrush current mode for lamp loads?
No, SI83418BDA-IFR does not include Inrush Current Mode. That feature is present only on SI83418AAA-IFR and SI83418ADA-IFR variants. SI83418BDA-IFR is optimized for steady-state solenoid and relay control without high-surge capability.
How many diagnostic reports does SI83418BDA-IFR provide, and how are they accessed?
SI83418BDA-IFR provides eight distinct diagnostic reports - including overtemperature, overcurrent, open-circuit, VDD2 undervoltage, and communication error - all accessible exclusively via SPI read operations to the device's status registers; no parallel indicator pins are implemented.
What isolation certifications apply to SI83418BDA-IFR?
SI83418BDA-IFR carries UL 1577 recognition (1500 Vrms, 1 min), CSA certification to 62368-1, and CQC approval to GB4943.1. Its 1.5 kVRMS isolation rating meets reinforced insulation requirements for industrial equipment operating up to 300 V working voltage.
Is there an output enable (OE) pin on SI83418BDA-IFR?
No, SI83418BDA-IFR does not include a hardware OE pin. Channel enable/disable is performed exclusively through the SPI interface by writing to the SW_EN register bits - enabling synchronized multi-channel control and eliminating asynchronous pin contention risks.
SI83418BDA-IFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.7µs, 3.7µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -, 3µs
- Voltage - Supply:
- 2.25V ~ 5.5V, 9V ~ 32V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-DFN (9x9)
SI83418BDA-IFR FAQ
1.How can I place an order for SI83418BDA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83418BDA-IFR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI83418BDA-IFR reliable?
The price and inventory of SI83418BDA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83418BDA-IFR is usually 5 days.
3.What payment methods are accepted for SI83418BDA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83418BDA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83418BDA-IFR?
SI83418BDA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83418BDA-IFR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI83418BDA-IFR?
For technical support, including SI83418BDA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83418BDA-IFR requirements.
6.How does Aetrix verify that SI83418BDA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83418BDA-IFR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI83418BDA-IFR meets industry standards.
7.What is the process for return or replacement of SI83418BDA-IFR?
All SI83418BDA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83418BDA-IFR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI83418BDA-IFR part is unused and in its original packaging.
Return procedure for SI83418BDA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83418BDA-IFR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
